package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.Collections;
import java.util.List;

@Service
@Slf4j
public class ShoppingCartServiceImpl implements ShoppingCartService {
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Override
    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {//添加购物车
        //判断当前加入到购物车的商品是否已经存在了
        ShoppingCart shoppingCart =new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);//属性拷贝
       Long userId= BaseContext.getCurrentId();//拿到微信用户的id
        shoppingCart.setUserId(userId);
        List<ShoppingCart> list=shoppingCartMapper.list(shoppingCart);

        //如果已经存在了，只需将数量加一
        if(list!=null&&list.size()>0){
          ShoppingCart cart= list.get(0);
          cart.setNumber(cart.getNumber()+1);//update shopping_cart set number=? where id=?
            shoppingCartMapper.updateNumberById(cart);
        }else{
            //如果不存在，需要插入一条购物车数据
            //判断本次添加到购物车的是菜品还是套餐
            Long dishId=shoppingCartDTO.getDishId();
            if(dishId!=null){
                //本次添加到购物车的是菜品
               Dish dish= dishMapper.getById(dishId);
               shoppingCart.setName(dish.getName());
               shoppingCart.setImage(dish.getImage());
               shoppingCart.setAmount(dish.getPrice());
              // shoppingCart.setDishFlavor(dish.get);
                shoppingCart.setNumber(1);
                shoppingCart.setCreateTime(LocalDateTime.now());
            }else{
                //本次添加到购物车的是套餐
                Long setmealId=shoppingCartDTO.getSetmealId();
               Setmeal setmeal= setmealMapper.getById(setmealId);

                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());
                // shoppingCart.setDishFlavor(dish.get);
                shoppingCart.setNumber(1);
                shoppingCart.setCreateTime(LocalDateTime.now());
            }

             shoppingCartMapper.insert(shoppingCart);
        }


    }

    @Override
    public List<ShoppingCart> showShoppingCart() {//查看购物车
       Long userId= BaseContext.getCurrentId();//获取当前微信用户id
      ShoppingCart shoppingCart=  ShoppingCart.builder()
                                              .userId(userId)
                                              .build();
        List<ShoppingCart> list=shoppingCartMapper.list(shoppingCart);
        return list;
    }

    @Override
    public void cleanShoppingCart() {//清空购物车
        Long userId= BaseContext.getCurrentId();//获取当前微信用户id
        shoppingCartMapper.deleteByUserId(userId);

    }
}
